UNS C44300 Admiralty Brass Tube PDF
What is ASTM B111 C44300 copper tubing?
C44300 brass, also known as arsenic-added naval brass, is an α-single-phase alloy with copper (Cu), zinc (Zn), and tin (Sn) as its core elements. Its unique feature is the addition of trace amounts of arsenic (As), which significantly enhances its resistance to dezincification corrosion. This material conforms to international standards such as ASTM B111M and ASTM B135/B135M, has a density of approximately 8.53 g/cm³, and combines high strength, corrosion resistance, and excellent machinability, making it a key material in marine engineering, energy equipment, and other fields.
C44300 Admiralty Brass Tube - Standard Sizes Overview
| Feature | Common Range / Specification | Notes & Standards |
|---|---|---|
| Standard | ASTM B111 / B111M | Primary spec for condenser & heat exchanger tubes. |
| Outside Diameter (OD) | 0.250" to 2.000" (6.35 mm to 50.8 mm) | Larger diameters available from some mills. |
| Wall Thickness | 0.028" to 0.165" (0.71 mm to 4.19 mm) | Often specified in BWG (Birmingham Wire Gauge). Common gauge: 18 BWG (1.24mm). |
| Length | Random (12' - 20') or Cut to Length | Standard random lengths for condenser applications. |
| Form | Seamless (Mandrel Drawn) | ASTM B111 covers seamless tubes for maximum corrosion resistance integrity. |
| Temper | Annealed (Soft) | Suitable for bending and tube expanding in condenser/heat exchanger assembly. |
| Equivalent Standards | ASME SB111, EN 12451 (CuZn20Sn) | Material may be supplied to other int'l standards upon request. |
Chemical Composition
Main Elements:
Copper (69%-71%): Ensures electrical conductivity and basic corrosion resistance.
Zinc (balance): Balances cost and mechanical properties.
Tin (0.8%-1.3%): Solid solution strengthens the matrix, improving strength and seawater corrosion resistance.
Key Additives:
Arsenic (0.03%-0.06%): Inhibits dezincification corrosion, extending service life in marine environments.
Impurity Control:
Lead (Pb≤0.05%), Iron (Fe≤0.10%), and total impurities ≤0.3%, ensuring material purity and processing stability.
C44300 Tubing Standard Chart
| Designation | Material Symbol | ||||
|---|---|---|---|---|---|
| GB/T8890 | DIN1785 | BS2871 | ASTM B111 | JIS H3300 | |
| Admiralty Brass | HSn70-1 | CuZn28Sn1 | CZ111 | C44300 | C4430 |
| Copper-Nickel | BFe10-1-1 | CuNi10Fe1Mn | CN102 | C70600 | C7060 |
| BFe30-1-1 | CuNi30Mn1Fe | CN107 | C71500 | C7150 | |
| (BFe30-2-2) | CuNi30Fe2Mn2 | CN108 | C71640 | C7164 | |
| (BFe5-1.5-0.5) | – | – | C70400 | – | |
| B7 | – | – | – | – | |
| Arsenical Brass | H68A | – | CZ126 | – | – |
| Boric Brass | Hsn70-18 | – | – | – | – |
| HSn70-1 AB | – | – | – | – | |
| Brass Tube | H65/H63 | CuZn36/CuZn37 | CZ108 | C28000/C27200 | C2800/C2700 |
Admiralty Brass Vs Naval Brass
| Properties | Admiralty Brass Tube | Naval Brass Tube |
|---|---|---|
| Composition | 29% zinc, 70% copper, and 1% tin | 39-41% zinc, 60-63% copper, and 0.75-1.25% tin. |
| Application | use for for heat exchangers and condensers tubing | use for valves, propeller shafts and fittings |
| Corrosion Resistance | excellent corrosion resistance | less corrosion resistance |
| Strength | lower strength due to its lower zinc | higher strength |
| Machinability | good machinability | less machinability |
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Founded in 2008, we are a leading professional exporter specializing in a comprehensive range of high-quality copper products for global markets. Our core product portfolio encompasses various forms and specifications to meet diverse industrial needs.
Copper Tubes & Pipes:
We supply both Copper Seamless Tubes (ASTM B68, B75) and Copper Welded Tubes, including Pure Copper Tubes (C11000, C12200), Brass Tubes (C23000, C26000, C28000), and specialized Admiralty Brass Tubes (C44300) for superior corrosion resistance in heat exchanger applications. Our offerings comply with key ASTM standards such as ASTM B88 for seamless water tube and ASTM B111 for condenser tubes.
Copper Sheets & Plates:
Our range covers from thin-gauge Thin Copper Sheet (ASTM B152) to heavy-duty Thick Copper Plate, available in alloys like Pure Copper (C11000), Brass Sheet (C26000), Phosphor Bronze Sheet (C51000, C52100), and corrosion-resistant Admiralty Brass Sheet/Plate (C44300).
Copper Rods & Bars:
We provide Copper Round Rod, Copper Square Bar, Copper Hexagon Bar, and Copper Flat Bar in various tempers. Products include Free-Cutting Brass Rod (C36000 per ASTM B16), Oxygen-Free Copper Rod (C10100/C10200, ASTM B187), Beryllium Copper Bar (C17200, ASTM B196), and Admiralty Brass Rod (C44300).
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Our Copper Wire products include Bare Copper Wire (ASTM B1/B2/B3), Enamelled Copper Wire, and Brass Wire. We also supply precision Copper Strip (C11000, C26800), Brass Strip, and Admiralty Brass Strip (C44300) for electrical, marine, and fabrication applications.
